@namespace url('http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul');

.inspect {
  list-style-image: url();
}
.check {
  list-style-image: url('chrome://global/skin/icons/find.png');
  -moz-image-region: rect(0px, 48px, 16px, 32px);
}
.inspect-devtools {
    list-style-image: url('chrome://browser/skin/devtools/inspect-button.png');
    -moz-image-region: rect(0px, 16px, 16px, 0px);
}